The arrest of 45-year-old Newtown resident Gregory Bomba, a past captain of the Echo Hose Hook & Ladder Co. 1, comes four days after the first suspect, William Tortora, was charged in the case.

In a prepared statement, Detective Christopher Nugent said Bomba surrendered to police Monday after detectives obtained a warrant charging him with second-degree arson, second-degree reckless endangerment, second-degree criminal mischief, and three counts of conspiracy.

Bomba was held on $250,000 bond to be arraigned at Superior Court in Derby.

After Bomba appeared in court his bond was reduced to $100,000, according to an online court database Tuesday. The same database lists Bomba as still being in custody, though there is no record of that in the state’s publicly-searchable inmate database.

He is scheduled to appear in court again March 13.

The fire happened Feb. 3 in the rear parking lot of Echo Hose Hook & Ladder Co. 1 at 379 Coram Ave. as a “past captains dinner” took place inside the firehouse.

“The investigation revealed that the fire was intentionally started in the rear of a pickup truck which was parked abutting the firehouse,” Nugent said. “Detectives investigated the incident by identifying individuals involved, interviewing several members of the Shelton Fire Department, as well as individuals that were present at the past captains dinner that evening.”